Historic earthquake sequences on subduction zones that are similar to the Cascadia subduction zone are used to hypothesize the nature of shallow subduction earthquakes that might occur in the northwestern United States. Based on systematic comparisons of several physical characteristics, including physiography and seismicity, subduction zones that are deemed most similar to the Cascadia subduct...

Continental break-up is an ingredient of plate tectonics and the Wilson cycle. During evolution Tethyan Realm since Paleozoic, a series ribbon-like (micro-)continents are split from Gondwana drifted northwards to Eurasian continent. The initial opening Neo-Tethys Ocean follows typical continental marginal Cimmeria Gondwana, which generally considered be driven by subduction Paleo-Tethyan plate....

[1] A >500-km-long east-west trending metamorphic belt in the Qiangtang terrane of central Tibet consists of tectonic melange that occurs in the footwalls of Late Triassic–Early Jurassic domal low-angle normal faults. The melange is comprised of a strongly deformed matrix of metasedimentary and mafic schists that encloses lesser-deformed blocks of metabasites, Carboniferous–Triassic metasedimen...

Abstract Subduction of oceanic lithosphere is a diagnostic characteristic plate tectonics. However, the geodynamic processes from initiation to termination subduction zones remain enigmatic mainly due scarcity appropriate rock records. We report first discovery early Paleozoic boninitic blueschists and associated greenschists eastern Proto-Tethyan North Qilian orogenic belt, northeastern Tibet,...

[1] On 23 June 2001, a Mw = 8.4 underthrusting earthquake occurred in the southern Peru subduction zone, followed by several large aftershocks, including 26 June (Mw = 6.7) and 7 July (Mw = 7.5). Broadband analyses of seismic data for the largest of these earthquakes show southeastward rupture of 180 km along the portion of the subduction zone previously ruptured in 1868 (Mw 8.8–9). Moment rele...

The study area is located in the western portion of Isfahan, in Shahrekord-Dehsard Terrene. This area is part of the Sanandaj- Sirjan structural Zone. In this area, metamorphosed igneous outcrops contain greenschist and metabasite rocks. These rocks have metamorphed into greenschist facies and belong to the Triassic-Jurassic age. The etabasite is mainly composed of plagioclase, amphibole, epido...

New structural data have been collected in the high-pressure meta-ophiolites exposed Lanzo Valleys (i.e., Ophiolite, LVO) and tectonically overlying continental crust of Dora-Maira Gran Paradiso massifs Western Alps. Detailed geological mapping analysis carried out south-western sector LVO Upper Viù Valley) allow to distinguish four ductile deformation phases, corresponding subduction-related D...

Large subduction earthquakes on the Cascadia subduction zone pose a potential seismic hazard. Very young oceanic lithosphere (10 million years old) is being subducted beneath North America at a rate of approximately 4 centimeters per year. The Cascadia subduction zone shares many characteristics with subduction zones in southern Chile, southwestern Japan, and Colombia, where comparably young oc...

The enigmatic geodynamic processes involved in the India-Asia collision shape our understanding of uplift and deformation Tibetan Plateau subsequent changes land-sea distribution pattern, monsoon-arid environments biotic evolution Central-Eastern Asia. However, current models dealing with history exhibit significant discrepancies how, when where exactly India Asia occurred. Recently, we propose...